... GSM Coin Payphone with Working Frequency of 850/900/1,800/1,900MHz, Low Power Indication.. Country of Origin: ... GSM telecommunication modeUsing 5, 20 and 50C, 1 and 2 Euro coinsMaximum 6 pieces coins could ... Input: 220V ACOutput: 7.5V/1.5AOperating conditions: Working frequency: GSM 850/900/1,800/1,900MHzTemperature: -10 to 40° ... with Working Frequency of 850/900/1,800/1,900MHz, Low Power Indication